diff --git a/implementations/Nim/defs.txt b/implementations/Nim/defs.txt
index 251127e..4743668 100644
--- a/implementations/Nim/defs.txt
+++ b/implementations/Nim/defs.txt
@@ -1,3 +1,9 @@
+eq [false] [true] [false] cmp
+gt [true] [false] [false] cmp
+lt [false] [false] [true] cmp
+neq [true] [false] [true] cmp
+le [false] [true] [true] cmp
+ge [true] [true] [false] cmp
 -- 1 -
 ? dup bool
 && nulco [nullary [false]] dip branch
@@ -26,7 +32,8 @@ codi cons dip
 codireco codi reco
 dinfrirst dip infrst
 dipd [dip] codi
-disenstacken ? [uncons ?] loop pop
+disenstacken swaack pop
+divmod [/] [%] clop
 down_to_zero [0 >] [dup --] while
 drop [rest] times
 dupd [dup] dip
@@ -52,6 +59,7 @@ mod %
 neg 0 swap -
 not [true] [false] branch
 nulco [nullary] cons
+null [] concat bool not
 nullary [stack] dinfrirst
 of swap at
 pam [i] map
@@ -64,7 +72,7 @@ popopd [popop] dip
 popopdd [popop] dipd
 product 1 swap [*] step
 quoted [unit] dip
-range [0 <=] [1 - dup] anamorphism
+range [0 <=] [-- dup] anamorphism
 range_to_zero unit [down_to_zero] infra
 reco rest cons
 rest uncons popd
@@ -79,10 +87,11 @@ second rest first
 shift uncons [swons] dip
 shunt [swons] step
 size [pop ++] step_zero
+small dup null [rest null] [pop true] branch
 spiral_next [[[abs] ii <=] [[<>] [pop !-] ||] &&] [[!-] [[++]] [[--]] ifte dip] [[pop !-] [--] [++] ifte] ifte
 split_at [drop] [take] clop
 split_list [take reverse] [drop] clop
-sqr dup *
+sqr dup mul
 stackd [stack] dip
 step_zero 0 roll> step
 stuncons stack uncons
@@ -90,7 +99,6 @@ sum [+] step_zero
 swapd [swap] dip
 swons swap cons
 swoncat swap concat
-sqr dup mul
 tailrec [i] genrec
 take <<{} [shift] times pop
 ternary binary popd
@@ -100,6 +108,7 @@ unary nullary popd
 uncons [first] [rest] cleave
 unit [] cons
 unquoted [i] dip
+unstack [[] swaack] dip swoncat swaack pop
 unswons uncons swap
 while swap nulco dupdipd concat loop
 x dup i
@@ -117,3 +126,6 @@ _mape popd reverse
 _map0 [_map1] dipd _map2
 _map1 stackd shift
 _map2 [infrst] cons dipd roll< swons
+_\/_ [not not] [not] branch
+/\ [not not ] ii [pop false] [] branch
+\/ [not not ] ii [] [pop true] branch
\ No newline at end of file
diff --git a/implementations/defs.txt b/implementations/defs.txt
index 8767ffb..4743668 100644
--- a/implementations/defs.txt
+++ b/implementations/defs.txt
@@ -127,5 +127,5 @@ _map0 [_map1] dipd _map2
 _map1 stackd shift
 _map2 [infrst] cons dipd roll< swons
 _\/_ [not not] [not] branch
-/\ [pop false] [not not] branch
-\/ [not not] [pop true] branch
\ No newline at end of file
+/\ [not not ] ii [pop false] [] branch
+\/ [not not ] ii [] [pop true] branch
\ No newline at end of file